Evolution of Proto–Neutron Stars | Zendy

J. A. Pons | Zendy; Sanjay Reddy | Zendy; Madappa Prakash | Zendy; James M. Lattimer | Zendy; J. A. Miralles | Zendy

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Evolution of Proto–Neutron Stars

Author(s) -

J. A. Pons,

Sanjay Reddy,

Madappa Prakash,

James M. Lattimer,

J. A. Miralles

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306889

Subject(s) - physics , neutrino , neutron star , equation of state , nuclear physics , diffusion , astrophysics , opacity , thermodynamics , optics

We study the thermal and chemical evolution during the Kelvin-Helmholtz phaseof the birth of a neutron star, employing neutrino opacities that areconsistently calculated with the underlying equation of state (EOS).Expressions for the diffusion coefficients appropriate for general relativisticneutrino transport in the equilibrium diffusion approximation are derived. Thediffusion coefficients are evaluated using a field-theoretical finitetemperature EOS that includes the possible presence of hyperons. The variationof the diffusion coefficients is studied as a function of EOS and compositionalparameters. We present results from numerical simulations of protoneutron starcooling for internal stellar properties as well as emitted neutrino energiesand luminosities. We discuss the influence of the initial stellar model, thetotal mass, the underlying EOS, and the addition of hyperons on the evolutionof the protoneutron star and upon the expected signal in terrestrial detectors.Comment: 67 pages, 25 figure

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